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NMR Noise

We report recent insights into the origin and properties of NMR noise, which originates from the tightly coupled system of spins and tuned radio-frequency circuits. Comparing results on different instruments for solids and liquids, with and without cryogenically cooled probes, with largely varying electronic properties [1-3] a more systematic approach to understanding the deviations of observed spin-noise behavior from theoretical predictions is developed. [1] Norbert Müller and Alexej Jerschow, Nuclear Spin Noise Imaging, Proc. Nat. Acad. Sci. (USA) 103, 6790-6792 (2006). [2] Martin Nausner, Judith Schlagnitweit, Vilko Smrečki, Xu Yang, Alexej Jerschow and Norbert Müller, Non-linearity and frequency shifts of nuclear magnetic spin-noise, J. Magn. Reson. 198, 73–79 (2009). [3] Patrick Giraudeau, Norbert Müller, Alexej Jerschow, and Lucio Frydman, 1H NMR noise measurements in hyperpolarized liquid samples, Chemical Physics Letters 489, 107–112 (2010).

NMR spin noise

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